How to waterproof the flower beds on the roof?

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Roof waterproof construction method

Generally, a soft waterproof layer and a hard cement layer must be laid for roof waterproofing, and the construction method must be strictly followed, so that the roof can be effectively waterproof for decades (depending on the construction quality).

Laying of flexible waterproof layer

I. Materials

1, linoleum: it must conform to cns10410a2158.

2. Waterproof ointment: Apply oil to the sealing bottom of concrete or masonry surface, and apply adhesive oil to linoleum. (Note: Asphalt is irreplaceable)

Second, the construction

1, preparation work

⑴ Roof placement: Do not concentrate materials on the floor, so as not to exceed the structural design load.

⑵ Weather conditions: In case of adverse weather or temperature change beyond the recommended range of the manufacturer, construction is not allowed, and construction can only be carried out when the weather is good.

(3) Preparation of construction surface: The paved surface of waterproof layer should be thoroughly cleaned before construction, and oil, dust, gravel and other sundries should be thoroughly removed.

Step 2 place

(1) Construction surface treatment

A, the intersection angle between the construction plane and the wall surface is made into an arc or obtuse angle with 1: 3 cement mortar powder.

B, the edge of the waterproof layer folded along the wall should be embedded in the wall.

C, before construction, the construction surface should be fully dry, and the surface should be clean without sundries.

(2) Laying waterproof ointment and linoleum.

A, first according to the specifications and shape of the construction surface cutting linoleum.

B, waterproof ointment must be placed in a container with fire heating, keep high temperature, and the ointment should not be sticky as well.

C before laying the integral linoleum around downspouts, the linoleum should be cut into sectors and paved with hot waterproof ointment into a circle with a diameter of not less than 50 cm. The waterproof membrane should extend at least 3 cm into the downpipe.

D, spread a layer of hot waterproof ointment on the construction surface, not less than 4kg per square meter, spread evenly, leaving no gaps and bubbles. While applying hot ointment, spread the prepared linoleum on the eaves and stick it firmly. In the future, the overlap between every two rolls of linoleum shall not be less than 15cm, and the overlapping area shall be coated with hot waterproof ointment and pasted firmly.

E, linoleum laying, should according to the roof flat slope, make all lap, from high to low close to each other. According to the slope, pave the low one first, and then pave the high one, so that the linoleum with high position overlaps the floor. (Roof slope is generally 2% ~ 3%. When the roof slope is less than 3%, the linoleum should be parallel to the roof. When the roof slope is 3%~ 15%, the linoleum should be perpendicular or parallel to the roof ridge. )

F, spread the second layer of hot waterproof ointment and the second layer of linoleum according to the above method, and the overlapping of the upper and lower layers of linoleum is staggered. The second layer of waterproof ointment shall not be less than 2 kg per square meter.

G, laying linoleum, can not have become warped edge, wrinkle, bubble, rupture and other omissions.

H, laid to the parapet and other prominent construction surface linoleum, should be laid on at least 25 cm oblique vertical plane, and brick pressure build by laying bricks or stones into the wall, or embedded in the reserved blank holder seam on the wall, and sealed with waterproof caulking agent.

I. After the paving of the above layers is completed, evenly spread a layer of hot waterproof ointment on the whole surface, not less than 3kg per square meter.

Laying rigid cement layer

I. Materials

1, plastic striped shed cloth: 8 meters in width, not less than 4 meters.

2, cement, fine sand, pebbles, etc.

Second, the construction

1. After the flexible waterproof layer is fully cooled, lay plastic striped shed cloth on it to form a floating layer (the two shed cloths must overlap) as a sliding interval between the rigid cement layer and the flexible waterproof layer.

2. Pave 5 cm thick fine stone concrete, and use 4 mm diameter iron wire inside to form barbed wire with the aperture less than 10× 10 cm to strengthen the tensile strength of concrete.

3. The frame joints between rigid cement layer and parapet and vertical wall can effectively prevent them from cracking.

4, a large area of the roof must be set frame joints, the gap is 2 cm, and the steel bars in the frame joints must be separated. After the concrete is fully dried, the frame joints shall be cleaned and filled with waterproof ointment. Frame joints are set along the slope and staggered with the joints of soft waterproof layer. Because the waterproof quality of frame joints is difficult to guarantee, it must be strictly operated.

5, rigid layer laid, the surface must form a slope, accelerate the water discharge from the roof.

After the whole waterproof roof is laid, the waterproof layer consists of seven layers: waterproof ointment, linoleum, waterproof ointment, linoleum, waterproof ointment, plastic striped tent cloth and concrete.